Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. At least one non-transient, computer-readable medium, carrying instructions that, when executed by at least one data processor, performs a method comprising: receiving a registration request for registering a mobile phone with a core network of a wireless communications network, wherein the registration request is for providing voice communications to the mobile phone; generating a stringent error message based on detecting an error condition in response to the registration request; identifying a stringent error message at a periphery node within the mobile communication network, wherein the stringent error message is identified at an IP Multimedia Subsystem (IMS) device, and wherein the stringent error message imposes more restrictive access or use of the core network than a lenient cause message; and sending the lenient cause message from the periphery node to the mobile device as a response to the registration request, wherein the lenient cause message replaces the stringent error message, and wherein the lenient cause message permits the mobile device to attempt to later connect to the core network without first resetting the mobile device.
2. The computer-readable medium of claim 1 , wherein the registration request is for accessing a higher-level communication service instead of an available lower-level communication service, wherein the higher-level communication service includes voice communications and/or messaging services according to a Fourth-Generation (4G) communication technology, a Long-Term Evolution (LTE) communication technology, a Wireless Fidelity (WiFi) communication technology, and/or a Fifth-Generation (G) communication technology, and wherein the lenient cause message is sent for enabling the mobile device to access the higher-level communication service at a subsequent time instead of disregarding the core network for the higher-level communication service subsequent to receiving the stringent error message.
3. The computer-readable medium of claim 1 , wherein the registration request is for accessing a higher-level communication service instead of an available lower-level communication service, wherein the higher-level communication service includes voice communications and/or messaging services according to a Fourth-Generation (4G) communication technology, a Long-Term Evolution (LTE) communication technology, a Wireless Fidelity (WiFi) communication technology, and/or a Fifth-Generation (G) communication technology.
4. The computer-readable medium of claim 1 , wherein the method further comprises: in response to identifying the stringent error message, identifying a network-access status of the mobile device based on communications with a Home Subscriber Server; and sending the lenient cause message from the IMS device when the network-access status indicates the mobile device is unauthorized to access the core network.
5. The computer-readable medium of claim 1 , wherein the method further comprises: tracking operating status of one or more nodes within the mobile communication network; and sending the lenient cause message from the IMS device when the operating status indicates an error condition with the one or more nodes.
6. The computer-readable medium of claim 1 , wherein the IMS device is a Proxy-Call Session Control Function (P-CSCF).
A system and method for managing communication sessions in an IP Multimedia Subsystem (IMS) network involves a Proxy-Call Session Control Function (P-CSCF) that processes signaling messages to establish, modify, or terminate multimedia sessions. The P-CSCF acts as the first point of contact for user devices within the IMS network, handling session initiation and routing requests to the appropriate network elements. It enforces policy controls, manages quality of service (QoS) parameters, and ensures secure communication by authenticating and authorizing session participants. The P-CSCF also interacts with other IMS components, such as the Serving-Call Session Control Function (S-CSCF) and the Interrogating-Call Session Control Function (I-CSCF), to facilitate seamless session management. The invention improves session reliability and efficiency by optimizing signaling pathways and reducing latency in session establishment. This solution addresses challenges in real-time communication, such as call setup delays and session drops, by enhancing the P-CSCF's role in managing session lifecycle events. The system is particularly useful in telecommunication networks where low-latency and high-reliability session handling is critical.
7. The computer-readable medium of claim 1 , wherein: the stringent error message corresponds to a 400-type Session Initiation Protocol (SIP) code; and the lenient cause message corresponds to a 500-type SIP code.
8. A method comprising: receiving a registration request for registering a user equipment (UE) with a core network, wherein the registration request is for providing voice communications to the UE; generating a stringent error message based on detecting an error condition in response to the registration request; identifying a stringent error message at a periphery node within a mobile communication network, wherein the stringent error message is identified at an IP Multimedia Subsystem (IMS) device, and wherein the stringent error message imposes more restrictive access or use of the core network than a lenient cause message; and sending the lenient cause message from the periphery node to the UE as a response to the registration request, wherein the lenient cause message replaces the stringent error message.
9. The method of claim 8 , wherein the IMS device includes logic configured to identify and replace the stringent error message.
A system and method for managing error messages in an IP Multimedia Subsystem (IMS) device involves detecting and modifying stringent error messages to improve user experience or system compatibility. The IMS device includes logic that identifies error messages, particularly those that are overly strict or non-standard, and replaces them with more appropriate or standardized alternatives. This process ensures that error handling is consistent and aligned with system requirements, reducing disruptions and improving interoperability. The logic may analyze error codes, message formats, or contextual data to determine when replacement is necessary. The replacement messages may be predefined or dynamically generated based on system conditions. This approach helps mitigate issues caused by rigid error handling in IMS networks, enhancing reliability and user satisfaction. The system may also log or report the original and replaced error messages for troubleshooting or compliance purposes. The method is particularly useful in environments where strict error messages could lead to unnecessary service interruptions or compatibility problems.
10. The method of claim 8 , further comprising: in response to identifying the stringent error message, identifying a network-access status of the UE based on communications with a Home Subscriber Server; and sending the lenient cause message from the IMS device when the network-access status indicates the UE is unauthorized to access the core network.
11. The method of claim 8 , further comprising: tracking operating status of one or more nodes within the mobile communication network; and sending the lenient cause message from the IMS device when the operating status indicates an error condition with the one or more nodes.
12. The method of claim 8 , wherein the IMS device is a Proxy-Call Session Control Function (P-CSCF).
A method for managing communication sessions in an IP Multimedia Subsystem (IMS) network involves using a Proxy-Call Session Control Function (P-CSCF) to handle session establishment, modification, and termination. The P-CSCF acts as the first point of contact for user devices within the IMS network, facilitating signaling and session control. This method ensures secure and efficient communication by authenticating and authorizing user devices, managing quality of service (QoS) parameters, and routing session-related signaling to the appropriate network elements. The P-CSCF also enforces policy controls, such as access restrictions and bandwidth management, to maintain network integrity. Additionally, the method may include mechanisms for detecting and mitigating security threats, such as denial-of-service attacks, by monitoring session traffic and applying protective measures. The P-CSCF may also interact with other IMS components, such as the Serving-Call Session Control Function (S-CSCF) and the Home Subscriber Server (HSS), to coordinate session management across the network. This approach enhances the reliability and performance of multimedia services, including voice, video, and messaging, in IMS-based networks.
13. The method of claim 8 , wherein the registration request is for accessing a higher-level communication service instead of an available lower-level communication service, wherein the higher-level communication service includes voice communications and/or messaging services according to a Fourth-Generation (4G) communication technology, a Long-Term Evolution (LTE) communication technology, a Wireless Fidelity (WiFi) communication technology, and/or a Fifth-Generation (5G) communication technology.
This invention relates to communication service registration in wireless networks, specifically addressing the selection of higher-level communication services over available lower-level alternatives. The method involves processing a registration request from a user device to access a higher-level communication service, such as voice communications or messaging, instead of a lower-level service. The higher-level services operate according to advanced communication technologies, including 4G, LTE, WiFi, or 5G. The method ensures that the device registers for the preferred higher-level service when available, optimizing performance and user experience. The registration process may involve evaluating network conditions, service availability, and device capabilities to determine the most suitable higher-level service. This approach enhances communication efficiency by prioritizing advanced services over legacy options, ensuring seamless connectivity and improved service quality. The invention is particularly useful in environments where multiple communication technologies coexist, allowing devices to leverage the best available network for voice and messaging services.
14. The method of claim 13 , wherein the lenient cause message is sent for enabling the UE to access the higher-level communication service at a subsequent time instead of disregarding the core network for the higher-level communication service subsequent to receiving the stringent error message.
15. The method of claim 8 , wherein: the stringent error message corresponds to a 400-type Session Initiation Protocol (SIP) code; and the lenient cause message corresponds to a 500-type SIP code.
This invention relates to error handling in Session Initiation Protocol (SIP) communications, specifically distinguishing between client-side and server-side errors. SIP is used for initiating, maintaining, and terminating real-time sessions like voice and video calls. A common challenge is accurately classifying errors to determine whether the issue originates from the client (e.g., malformed requests) or the server (e.g., resource failures). The method involves generating error messages in response to SIP request failures. When a SIP request fails, the system evaluates the cause of the failure and assigns an appropriate error message. A "stringent" error message is generated for client-side issues, corresponding to a 400-type SIP code (e.g., 400 Bad Request, 404 Not Found). These errors indicate problems with the request itself, such as syntax errors or missing parameters. Conversely, a "lenient" error message is generated for server-side issues, corresponding to a 500-type SIP code (e.g., 500 Server Internal Error, 503 Service Unavailable). These errors reflect server-side failures, such as overloaded resources or unavailability. The method ensures proper error classification, improving debugging and troubleshooting by clearly indicating whether the client or server is at fault. This distinction helps developers and administrators quickly identify and resolve issues in SIP-based communication systems.
16. A system comprising: one or more processors; memory coupled to the one or more processors, wherein the memory includes instructions executable by the one or more processors to: receive a registration request for registering a user equipment (UE) with a core network, wherein the registration request is for providing voice communications to the UE; generate a stringent error message based on detecting an error condition in response to the registration request; identify a stringent error message at a periphery node within a mobile communication network, wherein the stringent error message is identified at an IP Multimedia Subsystem (IMS) device, and wherein the stringent error message imposes more restrictive access or use of the core network than a lenient cause message; and send the lenient cause message from the periphery node to the UE as a response to the registration request instead of the stringent error message.
This invention relates to mobile communication networks, specifically systems for handling registration requests in IP Multimedia Subsystem (IMS) environments. The problem addressed is the need to balance network security and user experience when a user equipment (UE) attempts to register for voice communications with a core network. Current systems may generate stringent error messages that restrict access or usage of the core network, which can negatively impact user experience. The invention provides a solution by selectively replacing stringent error messages with lenient cause messages at a periphery node, such as an IMS device, to allow more flexible access while maintaining network integrity. The system includes one or more processors and memory storing instructions to receive a registration request for voice communications from a UE. Upon detecting an error condition, a stringent error message is generated, but instead of sending it, the system identifies the stringent message at a periphery node and replaces it with a lenient cause message. This lenient message imposes fewer restrictions on the UE's access to the core network compared to the original stringent message. The lenient message is then sent to the UE as a response to the registration request. This approach ensures that the UE can still access the network with reduced restrictions, improving user experience while maintaining network security.
17. The system of claim 16 , wherein the memory further includes instructions executable by the one or more processors to: in response to identifying the stringent error message, identify a network-access status of the UE based on communications with a Home Subscriber Server; and send the lenient cause message from the IMS device when the network-access status indicates the UE is unauthorized to access the core network.
18. The system of claim 16 , wherein the memory further includes instructions executable by the one or more processors to: track operating status of one or more nodes within the mobile communication network; and send the lenient cause message from the IMS device when the operating status indicates an error condition with the one or more nodes.
19. The system of claim 16 , wherein the IMS device is a Proxy-Call Session Control Function (P-CSCF).
20. The system of claim 16 , wherein the registration request is for accessing a higher-level communication service instead of an available lower-level communication service, wherein the higher-level communication service includes voice communications and/or messaging services according to a Fourth-Generation (4G) communication technology, a Long-Term Evolution (LTE) communication technology, a Wireless Fidelity (WiFi) communication technology, and/or a Fifth-Generation (G) communication technology.
Unknown
February 2, 2021
Browse 5M+ US patents with plain-English claim translations and AI-generated analysis.